.page-about {
  --ab-rail-w: 108px;
  --ab-gap: clamp(24px, 4vw, 56px);
  --ab-hairline: rgba(255, 176, 32, 0.28);
  background: var(--c-void);
  color: var(--c-white);
  font-family: var(--font-body);
}

.page-about a:focus-visible,
.page-about .ab-eco__card:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-about .ab-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.08em;
  color: var(--c-mute);
}

.page-about .ab-crumb a {
  color: var(--c-mute);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.page-about .ab-crumb a:hover {
  color: var(--c-cyan);
}

.page-about .ab-crumb [aria-current="page"] {
  color: var(--c-white);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 64px) 0 clamp(30px, 4vw, 56px);
  border-bottom: 1px solid var(--c-line);
  background-color: var(--c-deck);
  background-image:
    linear-gradient(114deg, rgba(0, 240, 208, 0.08) 0 30%, transparent 30.2%),
    linear-gradient(114deg, transparent 0 66%, rgba(138, 92, 255, 0.1) 66.2% 84%, transparent 84.2%),
    repeating-linear-gradient(90deg, rgba(42, 53, 66, 0.5) 0 1px, transparent 1px 96px);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(220px, 34%);
  height: 4px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-purple) 55%, var(--c-amber));
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-about .ab-hero__title {
  margin: 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 66px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.page-about .ab-hero__lead {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 34em;
  padding-left: 18px;
  border-left: 2px solid var(--c-amber);
  font-size: var(--fs-body);
  line-height: 1.78;
  color: #c3ccd6;
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .ab-hero__fact {
  padding: 16px 18px;
  background: var(--c-void);
}

.page-about .ab-hero__fact .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.page-about .ab-hero__fact .k {
  display: block;
  margin-top: 9px;
  font-size: var(--fs-anno);
  letter-spacing: 0.06em;
  color: var(--c-mute);
}

/* ---------- 双栏骨架 ---------- */
.page-about .ab-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding: clamp(28px, 4vw, 52px) 0 clamp(40px, 6vw, 84px);
}

.page-about .ab-rail {
  display: none;
}

.page-about .ab-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .ab-sec {
  padding: clamp(28px, 4.5vw, 54px) 0;
  border-top: 1px solid var(--ab-hairline);
  scroll-margin-top: 96px;
}

.page-about .ab-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .ab-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: clamp(16px, 2.2vw, 26px);
}

.page-about .ab-sec__no {
  padding: 2px 7px;
  border: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.16em;
  color: var(--c-cyan);
}

.page-about .ab-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--c-white);
}

.page-about .ab-sec__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.1em;
  color: var(--c-amber);
}

.page-about .ab-sub {
  margin: clamp(22px, 3vw, 32px) 0 12px;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-purple);
}

.page-about .ab-p {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: #c3ccd6;
}

.page-about .ab-link {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 240, 208, 0.42);
  transition: border-color var(--t-fast) var(--ease);
}

.page-about .ab-link:hover {
  border-bottom-color: var(--c-cyan);
}

/* ---------- 图片 ---------- */
.page-about .ab-fig {
  margin: 0 6px 6px 0;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .ab-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-fig__cap {
  padding: 10px 12px;
  border-top: 1px solid var(--c-line);
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--c-mute);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
}

/* ---------- 读数列 ---------- */
.page-about .ab-readouts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-readout {
  padding: 14px 16px 16px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  box-shadow: var(--shadow-hard-sm);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .ab-readout:hover {
  transform: translateY(-2px);
  border-color: var(--c-cyan);
}

.page-about .ab-readout__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.2vw, 38px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-cyan);
}

.page-about .ab-readout__k {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-white);
}

.page-about .ab-readout__d {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-anno);
  line-height: 1.65;
  color: var(--c-mute);
}

/* ---------- 发展线 ---------- */
.page-about .ab-time {
  position: relative;
  overflow: hidden;
  padding-top: 6px;
}

.page-about .ab-time__bg {
  position: absolute;
  top: -34px;
  right: -10%;
  width: min(560px, 74%);
  height: auto;
  opacity: 0.13;
  object-fit: cover;
  pointer-events: none;
}

.page-about .ab-time__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid rgba(255, 176, 32, 0.42);
}

.page-about .ab-time__item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 32px);
}

.page-about .ab-time__item:last-child {
  padding-bottom: 0;
}

.page-about .ab-time__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 10px;
  height: 10px;
  background: var(--c-amber);
  box-shadow: 0 0 0 3px rgba(255, 176, 32, 0.16);
  transform: rotate(45deg);
  transition: background var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}

.page-about .ab-time__item:hover::before {
  background: var(--c-cyan);
  box-shadow: 0 0 0 6px rgba(0, 240, 208, 0.18);
}

.page-about .ab-time__year {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.2vw, 26px);
  letter-spacing: 0.02em;
  color: var(--c-amber);
}

.page-about .ab-time__h {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-white);
}

/* ---------- 生态卡 ---------- */
.page-about .ab-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .ab-eco__card {
  padding: 16px 18px 18px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}

.page-about .ab-eco__card:hover {
  transform: translateY(-2px);
  border-color: var(--c-cyan);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .ab-eco__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-purple);
}

.page-about .ab-eco__card:hover .ab-eco__n {
  color: var(--c-cyan);
}

.page-about .ab-eco__k {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-white);
}

.page-about .ab-eco__d {
  margin: 8px 0 0;
  font-size: var(--fs-anno);
  line-height: 1.7;
  color: var(--c-mute);
}

/* ---------- 资料库 ---------- */
.page-about .ab-lib {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
}

/* ---------- 版本 ---------- */
.page-about .ab-version {
  margin: clamp(18px, 3vw, 26px) 0 clamp(18px, 3vw, 26px);
  padding: clamp(16px, 2.4vw, 24px);
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-amber);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .ab-version__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding-bottom: 14px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--c-line);
}

.page-about .ab-version__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.08em;
  color: var(--c-mute);
}

.page-about .ab-version__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-version__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px dashed rgba(42, 53, 66, 0.9);
}

.page-about .ab-version__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-version__k {
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-about .ab-version__v {
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: #c3ccd6;
}

/* ---------- 资质 ---------- */
.page-about .ab-honors {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 18px 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .ab-honor {
  padding: 16px 18px;
  background: var(--c-deck);
  border: 1px solid var(--c-line);
  border-top: 2px solid var(--c-purple);
}

.page-about .ab-honor__k {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.16em;
  color: var(--c-purple);
}

.page-about .ab-honor__v {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-h3);
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-white);
}

.page-about .ab-honor__d {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-anno);
  line-height: 1.7;
  color: var(--c-mute);
}

/* ---------- 收束 ---------- */
.page-about .ab-cta {
  margin-top: clamp(24px, 4vw, 44px);
  padding: clamp(22px, 3.4vw, 38px);
  background:
    linear-gradient(118deg, rgba(0, 240, 208, 0.09) 0 26%, transparent 26.3%),
    var(--c-deck);
  border: 1px solid var(--c-line);
  border-top: 2px solid var(--c-cyan);
  box-shadow: var(--shadow-hard);
}

.page-about .ab-cta__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-anno);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.page-about .ab-cta__title {
  margin: 0;
  max-width: 22em;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--c-white);
}

.page-about .ab-cta__text {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--c-mute);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ab-honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-version__item {
    grid-template-columns: minmax(120px, 0.32fr) minmax(0, 1fr);
    gap: 6px 18px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-about .ab-eco {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .ab-eco__card:nth-child(2),
  .page-about .ab-eco__card:nth-child(5) {
    margin-top: 20px;
  }

  .page-about .ab-eco__card:nth-child(3) {
    margin-top: 10px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-team,
  .page-about .ab-lib {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-about .ab-team__fig,
  .page-about .ab-lib__fig {
    size: 100%;
  }
}

@media (min-width: 960px) {
  .page-about .ab-body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: var(--ab-gap);
    align-items: start;
  }

  .page-about .ab-rail {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
    padding: 4px 10px 4px 0;
    border-right: 1px solid var(--c-line);
  }

  .page-about .ab-rail__nav {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .page-about .ab-rail__item {
    display: flex;
    gap: 10px;
    padding: 10px 4px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--c-mute);
    text-decoration: none;
    transition: color var(--t-fast) var(--ease);
  }

  .page-about .ab-rail__item:hover {
    color: var(--c-cyan);
  }

  .page-about .ab-rail__no {
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--c-line);
    transition: color var(--t-fast) var(--ease);
  }

  .page-about .ab-rail__item:hover .ab-rail__no {
    color: var(--c-amber);
  }
}

@media (min-width: 1100px) {
  .page-about .ab-hero__lead {
    max-width: 30em;
  }

  .page-about .ab-sec__title {
    max-width: 20em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-readout,
  .page-about .ab-eco__card,
  .page-about .ab-time__item::before {
    transition: none;
  }

  .page-about .ab-readout:hover,
  .page-about .ab-eco__card:hover {
    transform: none;
  }
}
<<<END>>>